Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e023746ba932ef…

MALICIOUS

PDF

84.2 KB Created: 2021-08-09 14:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e46464a1220b266b9e4dad2a9af5b403 SHA-1: 88fcb06e527f8679d5ebe5a667a474f482fd36b1 SHA-256: 80e023746ba932efdeadefc33a3e43176a6e0821266ee96f2daab1626cc0cccb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of multiple PDF link farm heuristics further supports this. No scripts were extracted, but the overall structure points to a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.tamilsaga.com/ckfinder/userfiles/files/veposumobogewazozi.pdf In PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/fb66a5e2871eba7b91d91da75d5c9bc6/nivogageguware.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aee6aba6a2---gewega.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf4e50f759---pujugarusagagobulinav.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c777c329dea---devasabovumasomudeg.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/kasixetam.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021080907035810.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/33377417474.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/98113000058.pdfIn PDF document text
    • https://etadelloro.it/images/file/rapemerumerajakugefokate.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/19268409202.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/81994977490.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/bowowilivivokowi.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/mtbj8eftfjt6m5feb2sjokvfl5/41822829852.pdfIn PDF document text
    • http://loaamtran.com/files/usersfiles/files/menabisiwi.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/14899054097.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/45279860504.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/21327659200.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/8479297797.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3ed0dea60---gitekesaj.pdfIn PDF document text
    • http://bienbao.org/uploads/files/79394057550.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/jeziruzubukipaxutudi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=respiratory+system+coloring+page+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE523 11120 bytes
SHA-256: 8539518e6201e6db4163f6ce43f7b0c4bca3651f783144e529987145299fa733
font_01_sfnt_off0000feec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEC 16796 bytes
SHA-256: 8b03bca1c8a9dc5683ca40d6dfe0d064071253eaeae9bdf0ed5ed7c57f8f3bfd
font_02_sfnt_off00012aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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